insouciant
01
无忧无虑的, 不在意的
having an unconcerned attitude, especially in situations where others might feel worried
例子
With an insouciant wave, he dismissed the idea as if it were of no importance at all.
他漫不经心地挥了挥手，好像这个想法一点也不重要似的把它打发了。
无忧无虑的, 不在意的
